Combination stop and pusher



Maich 27, 1945'. J. KERNER 2,372,499

COMBINATION STOP AND PUSHER Filed May 24, 1944 I 3 Sheets-Sheet l I9 .1 INVENTOR.

c/QcoZ Kev 7261;

ATTORNEYS March 27, 1945. 1 .1. KERNER COMBINATION STOP AND rusnsn Filed May 24, 1944 s Sheets-Sheet s INVEN TOR. c/Qfiafi Ker-726v ATTDR N EYS Patented Mar. 27, 1945 Jacob Kerner, Chelsea, Mass.

Application May 24, 1944, Serial No. 537,131

Claims.

The invention relates to a combined stop and pusher device, and more especially to a stock stop and pusher attachment for punch presses or the like.

The primary object of the invention is the provision of a device of this character, wherein stock within a punch press will be firmly and properly held in position during the punching operation of the press, and such device being manually released from the stock and at a point entirely outside of the path of travel of the punch tool, so as to avoid any possibility of injury resultant therefrom -to an operator of the press.

Another object of the invention is the provision of a device of this character, wherein on the fitting of the same upon a punch press it will stop the work in the die for the first operation to pierce, slot or hole the work in this first operation, before blanking, while at the same time such device is applying a uniform pressure against the work, forcing it back against the back gauge and stripper plate of the press, allowing the operator a uniform forward movement for sliding the work between the gauge and stripper plate, for assuring accuracy, whence the work can be advanced for the next or any number of operations, to a final operation when the work is blanked or cut off.

A further object of the invention is the provision of a device'of this character, wherein the mounting thereof requires no changes in the punch press, and such mounting can be readily and easily made with dispatch, its use assuring the saving of considerable time on the part of an operator of the press, in that such device will aid in holding and re-locating a piece of work in the'said DIESS.

provision of a device of this character, which is simple in construction, thoroughly reliable and eflicient in operation, assuring accuracy in thehandling of work in a punch press, it being strong,

A still further object of the invention is the tion of a punch press and partly broken away showing the device constructed in accordance with the invention applied for service therewith.

Figure2 is a sectional view taken on the line 2-2 of Figure 1 looking in the direction of the arrows.

Figure 3 is'a fragmentary enlarged sectional view through the device shown in Figure 1 with certain parts omitted.

Figure 4 is a plan view of one modified form of the invention or the application of several of the devices shown in Figure l.

Figure 5 is a view similar to Figure 4 showing another modification of the invention.

Figure 6 is a similar view to Figure 5 with only one of the devices therein shown in use.

Similar reference character indicate correspondin parts throughout the several views in the drawings.

Referring to the drawings in detail, particularly Figures 1, 2 and 3 of the same, ID denotes a die block having an. opening II conforming in shape to that of the part to be cut or stamped from stock placed in a punch press or stamp machine of a standard construction. Above and aligned vertically with this opening I l is a punch or stamping tool l2 which is fitted within a movable head l3, the punch or stamping tool l2 being adapted to accurately fit into the die opening H and operates through stripper plate l4, it having an opening [5 registering with the die opening ll.

Between the die block In and the stripper plate M, which latter is superposed with respect to said block, are front and back gauges l6 and I1, respectively, these being spaced apart in parallel relation to each other to provide therebetween a guideway [8 for a strip stock I9 for punching or stamping action thereon by the punch l2 in the working of the press.

In Figures 1, 2 and 3 of the drawings there is shown one construction and arrangement of the device as constituting the present invention, which comprises a fiat plate-like body portion 20,.

atone end a reduced arm extension 2| provided with a downturned substantially right-angular contact finger 22, while at the opposite other end of such body portion 20 is an upturned rightangular ear 23, the finger andear being at rightangles to the plane of the body portion 20.

Y The body portion 20 is provided with an elongated slot 24 centrally thereof, which aligns with the finger and ear 22 and 23, respectively, and adapted to pass through this slot 24 is a guide screw 25 made fast in the stripper plate l4 to have the device located at one side of the guideway l8, which has a hole 26 opening into the same, the hole l8 being in the stripper plate and loosely receives the finger 22 so that the latter will make contact with the work l9 to urge it against the back gauge 1! for pressing contact therewith.

Anchored at one end on the screw 25 is one arm of a double arm expansion spring 21 which has its other arm engaged in the body portion 20 of the device, so that the spring will tension the latter in the direction of the work l9 to function as a stop and pusher therefor when in the guideway l8 during the punching operation of the press, as is clearly shown in Figures 1, 2 and 3 of the drawings.

In Figure l of the drawings there is shown two of the devices arranged on the stripper plate, these devices being denoted at 28 and 29, respectively, they being similar to each other, excepting that the device 2% in this particular instance has its finger 22 in the path of the end edge 30 of the Work it to function as a stop for the latter.

.To avoid any displacement of the finger 22 away from the path of the Work the opening 3! in the stripper plate has a straight abutment edge ,32 for this finger 22.

Ihe device 2% has its finger 33 slightly rounded at 34 along the outermost side edge to have the work l9 ride thereon when the said work is fed into the guideways in the press, this device 29 being effective as a pusher for the work to hold it against the rear gauge H of the press for accuracy in the punching operation of the same.

In Figures 5 and 6 of the drawings there is shown a modified form or stop and pusher "device comprising a substantially T-shaped fiat body portion 34 having at opposite ends of the cross-head area 35 thereof the fingers 3B, which are downturned from the body portion 34 and operate through the round holes M in the stripper plate M on the press to engage and push the work I9 against the rear gauge 51. In Figure 5 of the drawings this device having the body portion 34 is in association with the device having the body portion 2t, which in this instance the latter serves as a stop for the work, while the device with the body portion serves as a pusher for such work. The body portion 34 has the grip ear 38 which enables a user to move the device back away from the Work against the resistance of the spring 39. Also one side edge of each finger 35 is rounded as at 4B for the riding of the Work onto the same.

In Figure 6 of the drawings the device M which is similar to the device having the body portion 34 is used singly as a stop and pusher, in that the finger 42 engages the end of the work l9, while the finger 43 engages the side edge of such work forcing it back. against the rear gauge of the press.

The devices hereinbeiore described on engaging the work at one side edge thereof when within the guideway function as stops for such work, as well as a pusherfor the same, so that the said work may be subjected to a step-by-step feed motion within this guideway, which may be done manually or otherwise.

As has been shown in the drawings, the device in one instance is asingle unit device and in ano-ther instance a double unit device, as well through the stripper plate for disposition in the path of and against stock in the stock guideway, and tensioning means active on the body portion for urging the finger in engaging positions against the stock.

2, In a punch press, the combination with a cooperating die and punch, said die having a stripper plate over-lying the same and spaced therefrom to afford a stock guideway, of a combined stop and pusher device having a body portion slidably fitted to the stripper plate, a downturned finger on the body portion and working through the stripper plate for disposition in the path of and against stock in the stock guideway, tensioning means active on the body portion for urging the finger in engaging positions against the stock, and means connecting the body portion to the stripper plate for directing the finger toward the stock.

3., In a punch press, the combination with a cooperating die and punch, said die having a stripper plate over lying the same and spaced therefrom to afford a stock guideway, of a combined stop and-pusher device having a body por tion slidably fitted to the stripper plate, a downturned finger on the body portion and working through the stripper plate for disposition in the path of and against stock in the stock guideway, tensioning means active on the body portion for urging the finger in engaging positions against the stock, means connecting the body portion to the stripper plate for directing the finger toward the stock, and an upturned hand grip on the body portion remote from the finger.

4. In a punch press, the combination with cooperating die and punch, a stripper plate overlying the same forming a stock guideway and having an opening communicating with said guideway, of a combined stop and pusher pivotally and slidably mounted on the stripper plate and having a downwardly turned end entering the opening and engaging the edge of the stock, and spring means acting on the pusher for urging the finger into engaging position against the stock.

5. In a punch press, the combination with cooperating die and punch, a stripper plate overlying the same forming a stock guideway and having two spaced openings communicating with said guideway, of a combined stop and pusher pivotally and slidably mounted on the stripper plate having inwardly extending arms provided with downwardly turned ends extending through the openings for engagement with the stock, an

JACOB KERNER. I 

